公开(公告)号：US5578434A

公开(公告)日：1996-11-26

申请号：US440832

申请日：1995-05-15

Applicant: Elda Moizo ,  Carlo Marchesano ,  Andrew Mott ,  Dian E. Stevenson

Inventor： Elda Moizo ,  Carlo Marchesano ,  Andrew Mott ,  Dian E. Stevenson

IPC: G03C5/29 ,  G03C5/30 ,  G03C5/305

CPC classification number: G03C5/30

Abstract: The present invention relates to a black-and-white aqueous alkaline photographic developer composition, free of dihydroxybenzene developing agent, comprising a reductic acid developing agent and an auxiliary superadditive developing agent, wherein the reductic acid developing agent is represented by the formula (I): ##STR1## wherein, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each are selected from the group consisting of hydrogen and group CH.sub.2 R.sub.5, wherein R.sub.5 is hydrogen or a monovalent group, e.g. amino, cyano, halogen, hydroxyl, carboxyl, sulfonyl, alkyl, cycloalkyl, aryl.A process for forming a black-and-white photographic silver image comprising developing a silver halide photographic element with said black-and-white aqueous alkaline photographic developer composition is also described.

Abstract translation: 本发明涉及一种不含二羟基苯显影剂的黑白水性碱性照相显影剂组合物，其包含还原酸显影剂和辅助超附加显影剂，其中还原酸显影剂由式（I）表示， ：其中，R 1，R 2，R 3和R 4各自选自氢和基团CH 2 R 5，其中R 5是氢或一价基团，例如 氨基，氰基，卤素，羟基，羧基，磺酰基，烷基，环烷基，芳基。 还描述了形成黑白照相银图像的方法，其包括用所述黑白水性碱性照相显影剂组合物显影卤化银照相元件。

公开(公告)号：US5478706A

公开(公告)日：1995-12-26

申请号：US206196

申请日：1994-03-03

Applicant: Carlo Marchesano ,  Filippo Faranda ,  Franco Buriano

Inventor： Carlo Marchesano ,  Filippo Faranda ,  Franco Buriano

IPC: G03C5/30 ,  G03C5/305 ,  G03C5/46

CPC classification number: G03C5/305 ,  G03C5/46

Abstract: The present invention relates to an alkaline aqueous black-and-white photographic developer composition comprising:(1) at least one black-and-white developing agent,(2) at least one black-and-white auxiliary developing agent,(3) at least one antifoggant,(4) at least one sequestering agent,(5) a sulfite antioxidant,(6) at least one buffering agent,(7) a tone agent, and(8) at least one tone promoting agent,wherein said tone agent is a primary organic amine compound and said tone promoting agent is a silver halide solvent.

Abstract translation: 本发明涉及一种碱性水性黑白照相显影剂组合物，其包含：（1）至少一种黑白显影剂，（2）至少一种黑白辅助显影剂，（3） 至少一种防灰雾剂，（4）至少一种螯合剂，（5）亚硫酸盐抗氧化剂，（6）至少一种缓冲剂，（7）调和剂，和（8）至少一种促压剂，其中所述 调色剂是主要的有机胺化合物，所述调色剂是卤化银溶剂。

公开(公告)号：US5273865A

公开(公告)日：1993-12-28

申请号：US685000

申请日：1991-04-15

Applicant: Marco Loiacono ,  Carlo Marchesano

Inventor： Marco Loiacono ,  Carlo Marchesano

IPC: G03C7/407 ,  G03C7/413 ,  G03C7/42 ,  G03C11/00

CPC classification number: G03C7/413

Abstract: A ready-to-use photographic color developing composition for the development of high bromide silver halide photographic element, said composition being substantially free of bromides, hydroxylamines and benzyl alcohol and comprising a color developing agent, a buffering agent, a complexing agent, an antifogging agent, a contrast promoting agent, an antioxidant agent and a polyol compound.A rapid access processing method of a high bromide silver halide photographic color element, said method comprising the steps of:developing said element for a period of about 75 to about 105 seconds in a ready-to-use color developing composition substantially free of bromides, hydroxylamines and benzylalcohol and comprising a color developing agent, a buffering agent, a complexing agent, an antifogging agent, a contrast promoting agent, an antioxidant agent and a compound of formula:R--(OH).sub.n wherein R is a straight or branched or alycyclic alkyle with 4 to 8 carbon atoms and n is an integer from 4 to 8, and containing said antioxidant agent in a quantity equal to or lower than 0.01 moles per liter with a developing agent to antioxidant agent molar ratio higher than or equal to 2:1,washing said element for a period of about 10 to about 20 seconds,bleach-fixing said element for a period of about 75 to about 105 seconds in a ready-to-use bleach and fix composition having a pH value in the range from 5 to 8 and having a bleaching agent to antioxidizing agent weight ratio equal to or lower than 20:1,and stabilizing said element, without washing between the bleach-fixing and stabilizing step, for a period of about 45 to about 75 seconds.

公开(公告)号：US4873180A

公开(公告)日：1989-10-10

申请号：US178251

申请日：1988-04-06

Applicant: Carlo Marchesano ,  Franco Buriano ,  Enrico Furlanetto

Inventor： Carlo Marchesano ,  Franco Buriano ,  Enrico Furlanetto

IPC: G03C7/30 ,  G03C5/305

CPC classification number: G03C5/3053

Abstract: The addition to an aqueous alkaline developer composition for silver halide photographic materials of a dialkylaminomethane diphosphonic acid compound sequestering agent increases the resistance of the developer composition against aerial oxidation and inhibits calcareous deposit formation.